Java/JSP/Component — различия между версиями
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Текущая версия на 07:10, 1 июня 2010
Print a month page
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS""
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
<%@page import="java.util.*,java.text.*" %>
<head>
<title>Print a month page.</title>
<meta name="version"
content="$Id: CalendarPage.jsp,v 1.6 2004/02/09 03:33:53 ian Exp $">
</head>
<body bgcolor="white">
<h1>Print a month page, for the Western calendar.</h1>
<P>Author Ian F. Darwin, http://www.darwinsys.ru/
<% // First get the month and year from the form.
boolean yyok = false; // -1 is a valid year, use boolean
int yy = 0, mm = 0;
String yyString = request.getParameter("year");
if (yyString != null && yyString.length() > 0) {
try {
yy = Integer.parseInt(yyString);
yyok = true;
} catch (NumberFormatException e) {
out.println("Year " + yyString + " invalid");
}
}
Calendar c = Calendar.getInstance();
if (!yyok)
yy = c.get(Calendar.YEAR);
String mmString = request.getParameter("month");
if (mmString == null) {
mm = c.get(Calendar.MONTH);
} else {
for (int i=0; i<months.length; i++)
if (months[i].equals(mmString)) {
mm = i;
break;
}
}
%>
<form method=post action="CalendarPage.jsp">
Month: <select name=month>
<% for (int i=0; i<months.length; i++) {
if (i==mm)
out.print("<option selected>");
else
out.print("<option>");
out.print(months[i]);
out.println("</option>");
}
%>
</select>
Year (4-digit):
<input type="text" size="5" name="year"
value="<%= yy %>"></input>
<input type=submit value="Display">
</form>
<%!
/** The names of the months */
String[] months = {
"January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December"
};
/** The days in each month. */
int dom[] = {
31, 28, 31, 30, /* jan feb mar apr */
31, 30, 31, 31, /* may jun jul aug */
30, 31, 30, 31 /* sep oct nov dec */
};
%>
<%
/** The number of days to leave blank at the start of this month */
int leadGap = 0;
%>
<table border=1>
<tr><th colspan=7><%= months[mm] %> <%= yy %></tr>
<tr><td>Su<td>Mo<td>Tu<td>We<td>Th<td>Fr<td>Sa</tr>
<%
GregorianCalendar calendar = new GregorianCalendar(yy, mm, 1);
// Compute how much to leave before the first.
// getDay() returns 0 for Sunday, which is just right.
leadGap = calendar.get(Calendar.DAY_OF_WEEK)-1;
int daysInMonth = dom[mm];
if (calendar.isLeapYear(calendar.get(Calendar.YEAR)) && mm == 1)
++daysInMonth;
out.print("<tr>");
// Blank out the labels before 1st day of month
for (int i = 0; i < leadGap; i++) {
out.print("<td> ");
}
// Fill in numbers for the day of month.
for (int i = 1; i <= daysInMonth; i++) {
out.print("<td>");
out.print(i);
out.print("</td>");
if ((leadGap + i) % 7 == 0) { // wrap if end of line.
out.println("</tr>");
out.print("<tr>");
}
}
%>
</tr>
</table>
